Air oompeessoe



(No Model.) I

G. F. FOGG.

AIR COMPRESSOR.

Patented Mar. 14, 1893.

- IQVENTURA WITN E55 E5 M Wmfim UNITED STATES PATENT OFFIC CHARLES F.FOGG, OF NEW YORK, N. Y.

AIR-COMPRESSOR.

SPECIFICATION forming part of Letters Patent N 0. 493,263, dated March14, 1893,

Application filed March 13, 1889. Renewed October 23, 1890. Againrenewed April 19, 1892. Serial No. 429,707.

To all whom it may concern.-

Be it known that I, CHARLES FREDERICK FOGG, of the city, county, andState of New York, have invented certain new and useful Improvements inAir-Compressors, of which the following is a specification.

The, object of my invention is to compress air by centrifugalforce'alone, without the aid of any leverage, or any other force orpower, except the motive power necessary to revolve the disk or arms ofmy compressor.

To attain the desired end, my invention consists in a revoluble disk orhub provided with radiating arms having air passages therethrough,secured to a hollow shaft with which,

said passages communicate, or its equivalent, resting upon asupportingbase, said disk or arms carrying one or more cylinders,provided at their outward heads with ingress valves for the admission ofair, and egress valves into a chamber communicating with passages in thesupporting disk or arms; weighted plungers or pistons fit within thecylinders, and said plungers or pistons are connected to a yokeencircling a stationary eccentric, all of which will be hereinafterfirst fully described, and then pointed out in the claims.

In the accompanying drawings, in which similar letters of referenceindicate corresponding parts:Figure 1 is a side elevation and partialsection of the compressor. Fig. 2 is an axial sectional view of thesame. .Fig. 3 is an enlarged sectional view of a portion of twocylinders opposite to each other, one on either side of the disk,showing the ingress and egress valves, and their action; the airchamber, and central air passage in the disk.

The disk B, is constructed of iron or other suitable material, and ofsufficient thickness to accommodate the air passages, V. In the centerof the disk is a hole, 0, through which runs the hollow shaft, D, whichis supported by a base, R, to which it is secured by caps, F. The disk Bis so constructed that it carries one or a series of cylinders, H, whichmay be either cast with the disk, or made separate therefrom, andsecured thereto in any suitable manner. The cylinders are placed uponone or both sides of the disk, preferably on both sides, in which casethey are arranged in pairs, opposite to each other. Within these (Nomodel.)

the cylinder, and egressvalves, T, into an air chamber, U, leading intothe air passage, V,

running in the disk, B, to the hollow W in w, w, are the outlets fromsaid shaft.

shaft D.

When constructed and arranged in accordance with the foregoingdescription, the operation of my device is as follows:The disk B is madeto revolve by the application of power to shaft, D, by means of thepulley. As the disk revolves, air rushes into the cylinder, H, throughvalves, S, and when compressed, through the egress valves, T, into theair-chamber, U, thence into the air passage, V in the disk, into andthrough the hollow shaft, D, out at 10,20. As the disk revolves, thecentrifugal force throws the weighted plungers or pistons, I, toward theperiphery of the disk, thereby compressing the air in the cylinders, andwhen the air thus compressed is under pressure equal to the centrifugalforce of the weighted plungers at a given speed, the latter are notforced or held against the cushion of compressedair by any leverage, butonly by centrifugal force, and recede easily to the full extent of theirstrokes, the cavities, J, enable the slotted connecting rods, M, toenter the plungers as particularly illustrated in the lower right-handcylinder in Fig. 2.

It is obvious that the cylinders and plungers or pistons, describedifferent circles as the disk revolves; that of the plungers beingeccentric to the circle described by the periphery of the disk, and thuspistons are compelled to change their positions in the cylinders,through the medium of their connections to the yoke surrounding thestationary eccentric. As a consequence, air is admitted and expelledalternately into and from the opposite cylinders; that is, while air isentering one cylinder, it is being expelled from the opposite theplungers or cylinders and when the disk has made a complete revolution,each of the cylinders has received and expelled air once.

My object in having the stationary eccentrices located as particularlyillustrated in Fig. 2, the center of one eccentric at the side of themain shaft opposite to the other, is to balance the disk as nearly aspossible, reducing the any required speed.

I have shown my device as consisting of a hollow disk, supporting thecylinders, H, but it is obvious that hollow arms radiating from a hubupon the hollow shaft D, might be substituted for such disk, withoutdeparting from the spirit of my invention, and oscillating cylindersmight be substituted for the fixed cylinders.

Having now fully described my invention, what I claim as new therein,and desire to secure by Letters Patent, is

1. The combination with a revoluble disk or arms provided with airpassages, as set forth, and bearing a series of cylinders adapted andarranged to revolve therewith, of weighted plungers or pistons, playingin said cylinders, said pistons being connected by means of slottedlinks to a revoluble yoke, eccentrically located to the shaft of thedisk, whereby the pistons will be drawn inward by the positiveconnections but driven outward by the centrifugal force alone, withoutleverage the whole mounted upon a supporting base, substantially asshown and described.

2. The combination with a revoluble disk or arms wherein are airpassages, to which disk or arms are secured cylinders, as set forth, ofweighted plungers or pistons fitting within said cylinders,and connectedby means of links to a strap or yoke encircling a stationary eccentricthrough which the shaft of the disk passes, whereby said plungers willbe driven outward by centrifugal force alone, but drawn inward bypositive connections substantially as shown and described.

3. The combination with a revoluble disk or arms provided with airpassages, as set friction, and enabling me to attain.

forth, and mounted upon a hollow shaft, of a series of cylinders securedto said disk or arms, and arranged to revolve therewith, and weightedplungers or pistons, playing in said cylinders, said plungers beingthrown outward by centrifugal force alone, and drawn inward by positiveconnections between said pistons and a yoke or strap encircling astationary eccentric through which the disk shaft passes, saidconnections consisting of slotted links pivoted at one extremity to theyoke, and connected to the pistons by pins passing through the slots,substantially as shown and described.

l. The combination with a rotatable disk or arms mounted upon a hollowshaft and bearing a series of cylinders having air passagescommunicating with a hollow shaft, and ingress and egress valvescontrolling said passages of pistons located in said cylinders, saidpistons being connected to a revoluble yoke by means of slotted linkswhereby they will be positively drawn inward, but willbe driven outwardby centrifugal force alone without any leverage, substantially as shownand described.

5. The combination of a revoluble disk or arms, having radial airpassages therein, and bearing a series of cylinders; weighted plungersor pistons fitting into said cylinders, and arranged to rotate therewithin a circle eccentric to the circle of rotation of the disk or arms, sothat the plungers or pistons will be driven outward by centrifugal forcealone; and drawn inward by positive connections to an eccentric, andegress valves communicating with an air chamber connecting cylinders onboth sides of the disk or arms and leading to a central air passage orpassages running through the disk or arms and opening into a hollowshaft, substantially as herein described.

CHARLES F. FOGG.

\Vitnesses:

llv. HUFFMAN 'BRO'WNE, Gno. WHITE.

